Array Substrate Driving Circuit for Display Panel Power Reduction
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Solution Overview
Problem
Current liquid crystal display technologies face challenges in reducing power consumption and improving image quality due to high switching frequencies of voltage polarities in the dot inversion driving manner, which increases costs and energy usage.
Innovation Solution
The proposed solution involves an array substrate with a reduced number of scan and data signal transmission channels, where sub-pixels are divided into repeating units, allowing for a lower switching frequency of voltage polarities by charging six sub-pixels in each repeating unit over multiple phases, with voltages switching between positive and negative every three charging sub-phases.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If dot inversion driving manner is used to improve image quality, then image quality is improved, but power consumption increases due to high switching frequency
Solution Approach 1:
The patent implements periodic action by dividing the frame period into multiple charging phases and sub-phases, with voltage polarity switching occurring at specific intervals (every three charging sub-phases). This periodic structure maintains image quality through controlled polarity reversal while reducing the effective switching frequency compared to conventional dot inversion methods, thereby lowering power consumption.
Solution Approach 2:
The patent segments the charging process into multiple phases and sub-phases, with each phase charging a specific subset of sub-pixels. This segmentation allows for controlled voltage polarity switching at the phase level rather than at every sub-pixel level, reducing the overall switching frequency while maintaining display quality through systematic coverage of all sub-pixels across phases.
2Illumination intensity
If dot inversion driving manner is used to improve image quality, then image quality is improved, but device complexity increases due to more channels
Solution Approach 1:
The patent merges multiple data lines into fewer data signal transmission channels by controlling multiple gate lines through a reduced number of scan signal transmission channels. Specifically, the array substrate includes fewer scan and data channels compared to traditional implementations, as multiple channels are combined and controlled through shared transmission paths and control circuits.
Solution Approach 2:
The control circuits in the patent exhibit multi-functionality by managing multiple gate lines and data lines through a reduced set of transmission channels. The scan control signal lines and data control signal lines enable the same physical channels to serve multiple functions across different phases and sub-phases, reducing the total number of dedicated channels required.
Data Source
AI summary
A method for driving an array substrate includes: charging six sub-pixels of each repeating unit controlled by two gate lines that are coupled to one first control sub-circuit in each of a plurality of charging phases included in a frame period; each charging phase including six charging sub-phases, and one sub-pixel of each repeating unit being charged in each charging sub-phase. In each charging sub-phase, the first control sub-circuit transmits a scanning signal from a scan signal transmission channel to one of two gate lines coupled thereto under control of a scan control signal transmitted by at least one scan control signal line; each second control sub-circuit transmits a data signal from a data signal transmission channel to one data line coupled to a repeating unit under control of a data control signal transmitted by at least one data control signal line.